I think they have that moment when we think of it as one of the best in life. Picking one is I think unfair lol.
I think for me, they have equal bearing as you can get different happiness when you are still in childhood, single or married life with kids. Each of that stage will bring happiness in your life with different impact in your life. So for me, I won't choose a single stage. They will give you happiness that is of different with each other.